访问Spring Boot应用程序拒绝与docker工具箱中运行的IP 192.168.99.100连接

Question

I am running a spring boot application in docker tool box. The application runs on port 8380 as set in application properties. However, when i run its image in a container, I am publishing with ports 8380:8082. When i access it from ip 192.168.99.100 (my docker machine ip) and port 8380, it gives me ERR_CONNECTION_REFUSED error. 192.168.99.100 refused to connect.

Any ideas what might be wrong?

I have tried using localhost instead of docker-machine ip. I checked the access url from kitematic ie 192.168.99.100:8380. Using this it does not work.

Here is my DockerFile:

FROM java:8
EXPOSE 8082
ADD /build/libs/tsi-csrportal-gui-2.0-SNAPSHOT.jar dockerDemoCsrportal.jar
ENTRYPOINT ["java", "-DTSI_APP_NAME=csrportal", "-DTSI_ENV=test", "-Dtsi.log.console", "-jar", "dockerDemoCsrportal.jar"]

I expect the service to give json response when I access with the proper endpoint. Similar to when I run the spring boot application without docker toolbox. (Only change is that now I use docker machine ip instead of using localhost)

Answer 1

When you expose a port in docker it means you can access to that container using [container_ip]:[exposed_port] .
But when you map the exposed port to another port it means that you can access to the container using [host_ip]:[mapped_port] .
So you can access like localhost:8380 or 192.168.99.100:8082